Go to start Menu > All Programs > OST Recovery after that the software first screen will appear as shown below–
Choose the "Add file button", a small window will pop up and you need to browse the OST file location from machine.
You can choose the desired file format as per your requirement, no file size limitation to convert .OST to .PST format.
Users can see the size of ost file when the scanning goes on. File creation date is also shown
A new screen of software appears, normal mail view tab allow you to view complete mail details
The following screen will appear with a export button. Click on Export button to Proceed.
If you want to export only selective emails then follow this step. For this, you have to check the boxes next to each message and right click on them.
An export option's screen appears with availability of three export option(PST, EML and MSG format). Choose the format in which you want to export your OST file.
Browse the location where you want to save your exported mail data. Exporting process shows the total number of exported items
For exporting complete OST file mail data click on "Export Button on Menu Bar". This export button is slightly different from above export option.
After clicking on export button, choose the desired file format to save OST file as PST, Office 365, EML & MSG format